package es.christiangarcia.android.pokepedia.dao.provider;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

public class PokepediaDatabaseHelper extends SQLiteOpenHelper {

	private static final String DATABASE_NAME = "pokepedia.db";
	private static final int DATABASE_VERSION = 1;
	private String dbPath = "/data/data/YOUR_PACKAGE/databases/";

	private SQLiteDatabase database;

	private Context context;

	public PokepediaDatabaseHelper(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
		this.context = context;
		this.dbPath = "/data/data/" + context.getPackageName() + "/databases/";
	}

	public SQLiteDatabase getDatabase() {
		return database;
	}

	public void createDataBase() throws IOException {

		boolean dbExist = checkDataBase();

		if (dbExist) {
			// do nothing - database already exist
		} else {
			// By calling this method and empty database will be created into
			// the default system path
			// of your application so we are gonna be able to overwrite that
			// database with our database.
			this.getReadableDatabase();

			try {
				copyDataBase();
			} catch (IOException e) {
				throw new Error("Error copying database");
			}
		}
	}

	private boolean checkDataBase() {

		SQLiteDatabase checkDB = null;

		try {
			String myPath = dbPath + DATABASE_NAME;
			checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
		} catch (SQLiteException e) {
			// database does't exist yet.
		}

		if (checkDB != null) {

			checkDB.close();

		}

		return checkDB != null ? true : false;
	}

	private void copyDataBase() throws IOException {

		// Open your local db as the input stream
		InputStream myInput = context.getAssets().open(DATABASE_NAME);

		// Path to the just created empty db
		String outFileName = dbPath + DATABASE_NAME;

		// Open the empty db as the output stream
		OutputStream myOutput = new FileOutputStream(outFileName);

		// transfer bytes from the inputfile to the outputfile
		byte[] buffer = new byte[1024];
		int length;
		while ((length = myInput.read(buffer)) > 0) {
			myOutput.write(buffer, 0, length);
		}

		// Close the streams
		myOutput.flush();
		myOutput.close();
		myInput.close();

	}

	public void openDataBase() throws SQLException {

		// Open the database
		String myPath = dbPath + DATABASE_NAME;
		database = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

	}

	@Override
	public synchronized void close() {
		if (database != null)
			database.close();

		super.close();
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		// AttackTable.onCreate(db);
		// HMTMTable.onCreate(db);
		// PokemonAttackHMTMTable.onCreate(db);
		// PokemonAttackLevelTable.onCreate(db);
		// PokemonTable.onCreate(db);
		// TypeTable.onCreate(db);

	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		// PokemonTable.onUpgrade(db, oldVersion, newVersion);
		// HMTMTable.onUpgrade(db, oldVersion, newVersion);
		// PokemonAttackHMTMTable.onUpgrade(db, oldVersion, newVersion);
		// PokemonAttackLevelTable.onUpgrade(db, oldVersion, newVersion);
		// PokemonTable.onUpgrade(db, oldVersion, newVersion);
		// TypeTable.onUpgrade(db, oldVersion, newVersion);
	}
}
